Gulo, Desman PerdamaianDesman PerdamaianGuloTUAN HUNG NGUYENChen, WeiliangWeiliangChenWang, ShuhuiShuhuiWangLiu, MingMingLiuKauppinen, Esko I.Esko I.KauppinenMaruyama, ShigeoShigeoMaruyamaChang, YumingYumingChangSaito, RiichiroRiichiroSaitoLiu, HsianglinHsianglinLiu2025-09-242025-09-242023https://www.scopus.com/inward/record.uri?eid=2-s2.0-85178152835&doi=10.1021%2Facs.jpclett.3c02528&partnerID=40&md5=297f1b01f3e69a313e992cdec6a749c3https://scholars.lib.ntu.edu.tw/handle/123456789/732296We present the resonant Raman spectra of a single-wall carbon nanotube inside a multiwall boron nitride nanotube (SWNT@BNNT). At E<inf>L</inf> = 1.58 eV, SWNT@BNNT exhibited resonant Raman spectra at 807 (ω<inf>BN</inf>) and 804 cm-1 (ω<inf>Gr</inf>). Their intensities almost disappeared at E<inf>L</inf> = 2.33 eV. We assigned ω<inf>BN</inf> to the out-of-plane BN phonon mode that coupled with ω<inf>Gr</inf>. At E<inf>L</inf> = 4.66 eV, the G+ and G- bands of the SWNT@BNNT red-shifted 3.8 cm-1 compared with the SWNT, suggesting the interwall interactions between the in-plane modes of SWNT and BNNT. Moreover, the E<inf>2g</inf> mode of the BNNT in SWNT@BNNT appeared at 1370.3 ± 0.1 cm-1, which is undistinguishable for E<inf>L</inf> < 3 eV because of the overlap with the D band frequency. The assignment of the present Raman spectra was confirmed through the first-principles calculations.Boron NitrideIii-v SemiconductorsNitridesPhononsRed ShiftSingle-walled Carbon Nanotubes (swcn)Band FrequenciesBoron Nitride NanotubesFirst Principle CalculationsIn-plane ModesInterwall InteractionOut-of-planePhonon ModeRed-shiftedResonant RamanSingle WallRaman ScatteringBoron Nitride NanotubeCarbon NanotubeSingle Walled NanotubeArticleControlled StudyPhononjournal article10.1021/acs.jpclett.3c025282-s2.0-85178152835